The Journal of Physical Chemistry Letters 2015-08-06

Effects of Solute-Solvent Hydrogen Bonding on Nonaqueous Electrolyte Structure.

Kjell W Schroder, Anthony G Dylla, Logan D C Bishop, Elizabeth R Kamilar, Jennette Saunders, Lauren J Webb, Keith J Stevenson

Index: J. Phys. Chem. Lett. 6 , 2888-91, (2015)

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Abstract

We investigate the source of Raman background signal commonly misidentified as fluorescence in nonaqueous electrolytes via a variety of spectroscopies (Raman, fluorescence, NMR) and find evidence of hydrogen-bonding interactions. This hydrogen bonding gives rise to broadband anharmonic vibrational modes and suggests that anions play an important and underappreciated role in the structure of nonaqueous electrolytes. Controlling electrolyte structure has important applications in advancing in operando spectroscopy measurements as well as understanding the stability of high concentration electrolytes for next-generation electrochemical energy storage devices.

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